And if their evasion is difficult for you, then if you are able to seek a tunnel into the earth or a stairway into the sky to bring them a sign, [then do so]. But if Allah had willed, He would have united them upon guidance. So never be of the ignorant.
English Transliteration
Wain kana kabura AAalayka iAAraduhum faini istataAAta an tabtaghiya nafaqan fee alardi aw sullaman fee alssamai fatatiyahum biayatin walaw shaa Allahu lajamaAAahum AAala alhuda fala takoonanna mina aljahileena
Tafsir of Verse 35
And if their turning away is distressful for thee, why, if thou canst seek out a hole in the earth, or a ladder in heaven, to bring them some sign but had God willed, He would have gathered them to the guidance; so be not thou one of the ignorant.
If their spurning is hard on thy mind, yet if thou wert able to seek a tunnel in the ground or a ladder to the skies and bring them a sign,- (what good?). If it were Allah's will, He could gather them together unto true guidance: so be not thou amongst those who are swayed by ignorance (and impatience)!